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General

# Author Problem Lang Verdict Time Memory Sent Judged
81876518 Practice:
apoorva222g
1288C - 5 GNU C++17 Time limit exceeded on test 3 1000 ms 86284 KB 2020-05-29 14:00:07 2020-05-29 14:00:08

→ Source
#include<bits/stdc++.h>
using   namespace std;
typedef long long int ll;
#define fo(i,s,e_ex) for(i=s;i<e_ex;i++)
#define Fo(i,k,n) for(i=k;k<n?i<=n:i>=n;k<n?i+=1:i-=1)
#define endl '\n'
#define MOD 1000000007//998244353
#define pbb push_back
#define mpp make_pair
#define ff first
#define ss second
#define all(x) x.begin(),x.end()
#define mset(arr,val) memset(arr,val,sizeof(arr))
ll dp[11][1001][1001];
ll findAns(ll idx,ll lasta,ll lastb,ll m){
if(idx==m) return 1;
if(dp[idx][lasta][lastb]>-1) {
//cout<<idx<<" "<<lasta<<" "<<lastb<<" "<<dp[idx][lasta][lastb]<<endl;
//cout<<"hi"<<endl;
return dp[idx][lasta][lastb];
}
ll myans=0;
ll i,j;
for(i=lasta;i<=lastb;i++){
for(j=i;j<=lastb;j++){
myans=(myans+findAns(idx+1,i,j,m))%MOD;
}
}
//cout<<idx<<" "<<lasta<<" "<<lastb<<" "<<dp[idx][lasta][lastb]<<endl;
return dp[idx][lasta][lastb]=myans;
}
void solve(){
ll i,j,n,m;
cin>>n>>m;
mset(dp,-1);
ll ans=0;
//for(i=1;i<=n;i++){
//for(j=i;j<=n;j++){
//ans=(ans+1+findAns(1,i,j,m))%MOD;
//}
//}
ans = findAns(0,1,n,m);
cout<<ans<<endl;
}
int main(){
ios_base::sync_with_stdio(false);
cin.tie(0);cout.tie(0);
ll t;
//cin>>t;
t=1;
while(t--){
solve();
}
return 0;
}


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Time: ? ms, memory: ? KB
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